"Engineers are assessing what allowed the seal to become dislodged to prevent the issue from recurring."
See full article...
See full article...
Presumably without the astronauts still attached to the rocket!This work will include activating a new set of flight termination system batteries for the rocket’s range safety destruct system, which would be used to destroy the vehicle if it veered off course during launch.
Only if they're waving a cowboy hat.Presumably without the astronauts still attached to the rocket!
Wasn't that the Artemis I mission?Given the issues with everything so far does it feel kind of reckless still to do this as a manned mission at this point without doing at least A unmanned flyby?
What is different about April 2?The first of five launch opportunities in early April is on April 1, with a two-hour launch window opening at 6:24 pm EDT (22:24 UTC). There are additional launch dates available on April 3, 4, 5, and 6.
Yes, but the number of issues and differences between Artemis I and II mean there’s an awful lot of stuff being flown / used for the first time on this flight.Wasn't that the Artemis I mission?
Top of my head it shifts by over 30 hours each time. So if you miss the 1st at 6pm, then the next launch window is the 3rd.What is different about April 2?
Way back, maybe Nancy Reagan or her astrologist didn't like that date... but nowadays, maybe something to do with our Dear Leader's wishes??What is different about April 2?
Who's to say the crew won't have "alien" masks on when they are recovered??Shame it's not scheduled for a return date of April 1st. But then the cost of supplying the entire crew of the ship that retrieves them from the ocean with Planet of the Apes masks would've been prohibitive.
Ahh ok, for some reason I thought Artemis 1 was just an earth orbit and not full trip round the moon.Yes, but the number of issues and differences between Artemis I and II mean there’s an awful lot of stuff being flown / used for the first time on this flight.
It is necessary to fire the self destruct before the crew escape system to prevent the solid boosters from hitting the crew pod.Presumably without the astronauts still attached to the rocket!
For some that's all it is but others want to pick up where Apollo left off. There is still a lot of work to be done up there if we are serious about lunar science, far more than robots can do on their own.Honest question, what is the stated goal of putting humans on the moon again, 60 years after the first time? Just to re-prove to ourselves that we can do it?
IIRC, the load test before that failed. What makes them think it's fixed?it passed a key fueling test on February 21. During that test, NASA loaded the Space Launch System rocket with super-cold propellants without any major problems, apparently overcoming a persistent hydrogen leak
It could have been something like that, but the given times don't match that: they are just less than 25 hours apart, but with a 50-hour gap between the Apr 1 and 3 windows.Top of my head it shifts by over 30 hours each time. So if you miss the 1st at 6pm, then the next launch window is the 3rd.
Perhaps read the fine article just above the comments?That said, I’ve got one gripe. It’s hard to miss that there’s no mention of the helium issue or the progress there, especially since it was serious enough to send the mission back to the Vehicle Assembly Building. Even a quick update on where that stands would have rounded out the story.
The rocket returned to the VAB on February 25, and within a week, engineers found the source of the helium flow issue. Inspections revealed that a seal in the quick disconnect, through which helium flows from ground systems into the rocket, was obstructing the pathway, according to NASA.
“The team removed the quick disconnect, reassembled the system, and began validating the repairs to the upper stage by running a reduced flow rate of helium through the mechanism to ensure the issue was resolved,” NASA said in an update posted Tuesday. “Engineers are assessing what allowed the seal to become dislodged to prevent the issue from recurring.”
The stated goal is to stay. Specifically, to build a permanently crewed outpost near the lunar south pole.Honest question, what is the stated goal of putting humans on the moon again, 60 years after the first time? Just to re-prove to ourselves that we can do it?
The first WDR failed due to a hydrogen leak at the main stage quick disconnect. This was traced back to a defective seal, which was replaced at the pad, and the leak was then confirmed as eliminated during the second WDR. The cause of the seal failure hasn't been formally or officially confirmed yet, but there's much speculation that the seal was somehow compromised via mechanical stresses (vibration, torsion) during transport of the rocket from the VAB to the pad.IIRC, the load test before that failed. What makes them think it's fixed?
If you've got two thermometers showing different temperatures, you've got no answers.
That has to do with the mission design. A mission to land at one place on the moon would have different launch window, but likely similarly constrained. Scott Manley did a video recently about Apollo's launch windows.a six day launch window each month
Sure, but Artemis 2 has nothing to do with that. The vehicles it tests- SLS and Orion- are expensive and single use. Exactly what you don't want if you want something sustainable.The stated goal is to stay. Specifically, to build a permanently crewed outpost near the lunar south pole.
The question regarded the stated goal. Not whether that goal was reasonable, whether the current Congressionally mandated set of hardware is the best way to accomplish that goal, or whether the current mission plans and political winds serve to advance that goal as efficiently as possible.Sure, but Artemis 2 has nothing to do with that. The vehicles it tests- SLS and Orion- are expensive and single use. Exactly what you don't want if you want something sustainable.
The only reason not to abandon SLS, aside from the jobs in districts angle, in favor of more sustainable vehicles is that we absolutely have to beat China. In other words, the goal is the same goal as the 1960s, and the results will be the same results (a brief flags and footprints expedition).
IIRC the shuttle was also operating under, shall we say - relaxed risk assessment?The combination of
- unreliable rocket (finicky? should I say finicky to be nice)
- no ability to do any significant work at the pad
- round trip rollback which takes at last two days
- a six day launch window each month
is just brutal.
NASA engineers fixed the issue on 03/03 but can even try again until 04/01. If on 04/01 the left handed flux capacitor has blown and can only be fixed at the VAB then next launch window is middle of May by the time they get it back, figure out the issue, and fix it.
The Shuttle use to have holds and scrubs all the time. Most people forget this because they view the Shuttle with rose colored glasses of nostalgia. The difference is they could fix most things at the pad and they had a new launch window every day once fixed. So Shuttle would get a scrub on Tuesday and launch on Wednesday or Thursday. Somewhat ironically the SLS program considered a pad service structure but cut it in order to ... <drumroll> ... save money.